Improvement in gear or pulley mechanisms



3 Sheets--Sheet 1.

-A. M. DAMON.

Improvement in Gear.or Pulle'y Mechanism.

No.123,618. Patented Feb. 13,1872.

Fay-3.

l? G J a I I .m, PHUTD-LU/IOSRAFHIC m n'x/vmanusk PHOL'ISS/ 3Sheets-Sheet 2.

A. M. DAMON Improvement in Gear of Pulley Mechanism.

Patented Feb. I3, 1872.

No. 123.,61 s.

3 Sheets--Sheet 3.

A. M. DAMON.

Improvement in Gear or Pulley Mechanism. 1

No.123,6 l8. H PatentedFeb.13,1872;

ALEXANDER M. DAMON, OF LOWELL, MASSACHUSETTS, ASSIGNOR TO HIM ATET SELFAND OLIVER H. MOULTON, OF SAME PLACE.

BMPROVEMENT IN GEAR OB PULLEY MECHANISMS.

Specification forming part of Letters Patent No. 123,618, dated February13, 1872.

To allpersons to whom these presents may come:

Be it known that I, ALEXANDER M. DAMON, of Lowell, in the county ofMiddlesex and State of Massachusetts, have invented new and usefulMechanism for Revolving a Gear or Pulley at different velocities by abelt running at one speed and on either of two pulleys; and I do herebydeclare the same to be fully described as follows, and to be representedin the accompanying drawing, of which- Figure 1 is a top view, Fig. 2 alongitudinal section, and Figs. 3, 4, and 5transverse sections of thesaid mechanism.

It is intended for use on warpers, slashers, or various other machineswhere two different speeds of their driving-gear maybe required to beproduced from a driving-belt running at a uniform speed.

In the said drawing, A denotes a stationary sh aft-that is, one which,when in use is not to revolve, but be absolutely stationary. On thisshaft, concentrically, there are arranged three pulleys, B O D, inmanner as represented, each being to revolve freely on the shaft. Thewheel D is what is termed a loose pulley. Each of the wheels or pulleysB O is provided with a cylindrical chamber, shown at a in the one end,at bin the other. Furthermore, a gear, E, is fixed to the wheel B, andrevolves with it about the shaft A, and there is also arranged withinthe pulley B, and fixed to it so as to revolve with it, a gear, F. Thisgear F engages with two gears, G G, all three gears, F G G, being equalin diameter, and each having a like number of teeth, as thirty-two, forinstance. The gears G G are fixed to two arbors, H H, which extendthrough and revolve freely within a rotary carrier, 1, which turnsfreely on the shaft A, and extends in opposite directions therefiom, asshown. The arbors H H support and have fixed to them two other gears, KK, arranged as represented, each of the said gears having a diameterlarger than that of its fellow gear, G or G, on the same arbor, and,

of course, a greater number of teeth, as, for instance, thirty-four. Thetwo gears K K engage with another gear, L, arranged between them on theshaft A, so as to freely revolve thereon; The gear L has thirty teeth.One of the arbors H is provided with a cylindrical journal, cl, extendedinto a corresponding hole, 0, made in the side of the pulley G, the sameserving to so engage the carrier I with the, pulley O as to cause theformer to be revolved, by and with the latter while it may be in revo--lution. The gear L has a locking-notch formed 7 in it, as shown ate,:there being arranged vertically within the shaft A, or in a chamber,f, a made therein, a slide-bolt, g, to act with such notch; the wholebeing so that, the gear L will be estopped from revolvin gin onedirection, and

be allowed to revolve in the opposite direction. If the driving-belt beslipped from the loose pulley D upon the pulley G, and be running in adirection to cause the belt g to be borne against the shoulder h of thenotch e, the gear L will be stopped from being revolved with the saidpulley C. Now, as the carrier I will be revolved with the pulley O andat the same velocity, the gears K K will be revolved in an orbital pathabout the gear L. As a consequence the gear K K will, in turn, berevolved by the gear L, each gear K or K making thirty thirty-fourths ofa revolution on its own axis while making an entire orbital revolution.The gears G G will revolve with the gears K K and their arbors, and, asaconsequence,

will revolve about and revolve the gear F,

which will revolve the pulley B and the gear E, the latter turning onceto each revolution, orbital or otherwise, of either gear G G. From theabove it will be seen that, while the pulley C may make thirty-fourrevolutions, the gear F will make but thirty. If, now, we shift the vbelt from the pulley O to the pulley B, the gear L will be immediatelyunclutched from the shaft A, in consequence of such gear being revolved,as it will be, in a direction to carry the bolt 9 away from the shoulderof the notch, and cause the bolt to slide upon the inclined part of thenotch and upward into the shaft. The gear L, being'thus unclutched fromthe shaft, will continue to revolve about it, the

clutch-bolt falling into and being raised out of v the notch during eachrevolution of the gear,v

without estoppin g the rotary motion of the gear as it did when the beltwas on the pulley 0. Consequently, as the pulley B is revolved by thedriving-belt, a like speed will be communicated to the gears E and F;and the carrier FFICE.

' I and the pulley G will be at rest, while the gears G G, K K, and Land the arbors HH will be revolved. Thus it will be seen that by meansof the mechanism, as hereinbefore described, the gear E will be drivenat the slower speed when the belt is upon the pulley O. I remark thatone gear, G, its arbor H, and gear K of such arbor may be dispensedwith, they being used to counterbalance the fellow arbor and its gears,and thereby cause the mechanism to run with less jar. It is better touse such auxiliary shaft and gears, as will be readily seen. M is apulley, which may be used with the pulley B, instead of or with the gearE. In the above-described mechanism, the shaft A is stationary, the gearrevolving on it. Should it, however, be desirable to have the shaft Arevolve at either of two difi'erent speeds, such may be efi'ected byconnectingit with the wheel B, and employing in place of said shaft astationary tubular shaft or sleeve,

arranged concentrically with the shaft, and ex tended through thepulleys D and O, and provided with a catch-notch like that of the gearL, the catch-bolt being arranged in the said gear. Under thesecircumstances the tubular shaft is the equivalent of the shaft A, which,when combined with the tubular shaft, will be moved by and with thewheel B, and, of course, may be moved at either of the two difi'erentspeeds, as the belt may be on one or the other of the pulleys B C. Fig.6 is a section of such a modification or construction of my invention,the tubular shaft being exhibited at A, and the shaft to revolve beingshown at A.

What I claim as my invention is v V 1. The stationary shaft A, thepulleys B and O, the gear F, the carrier I, the arbor H, the gears G K,the gear L, the journal d, hole or bearing 0, the slide-bolt g, and thelooking-notch 6, combined and arranged substantially in the manner asset forth, and for use with a gear, F, or its equivalent, or with suchand a loose pulley, D, all being essentially as specified. 2. I alsoclaim, in combination with the subject above claimed, the auxiliarycounterbal ancing-gears G K and the arbor H, arranged therewith,substantially as represented.

ALEXANDER M. DAMON. Witnesses:

GEORGE DRAPER, JOHN B. HUNT.

